LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

'95 LS dies ONLY when getting off freeway ONLY when below ~55* ambient

Old 10-12-10, 06:42 AM
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I'mStock
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Default '95 LS dies ONLY when getting off freeway ONLY when below ~55* ambient

Car never gives me trouble except on cold mornings when I'm getting off the freeway after my ~60 mile commute, when it's 55* or below. It'll die once I exit unless I maintain the revs myself. No other issues ever, car runs and drives like it should the whole way, it's just when my speed decreases... Once I start the car again, it runs great, like nothing ever happened.

Anything?
Old 10-12-10, 06:43 AM
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I'mStock
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Morning commas strike again.
Old 10-12-10, 07:18 AM
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python
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think this has occured to other members...try doing a search, might be a computer problem.
Old 10-12-10, 10:57 AM
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I'mStock
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I did search but it didn't really seem like any of the others were having problems in cold weather.
Old 10-12-10, 12:34 PM
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Originally Posted by I'mStock
I did search but it didn't really seem like any of the others were having problems in cold weather.
does seem to be the behavior of a bad ECU - it will do this no matter the temperature - it may be happenstance that it just started this in the change of seasons - did it behave like this last fall/winter?
Old 10-12-10, 02:43 PM
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Originally Posted by Marklouis
did it behave like this last fall/winter?
Yes'sir.





.
Old 10-13-10, 06:19 AM
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mine behaves like this after long drives - I can pull off the freeway after driving 80 mph for 3 hours and it idles so low it does die at times, but it will not do this in regular daily driving. it also will have the "hiccup" at times when letting off the gas pedal - both signs of a faulty ECU, it only acts up about 30% of the time. bad thing is these cant be reprogrammed for the fact they use Flash memory tech, so you have to find a "repaired" unit or a unit with a specific model # that doesnt have the issue. there are several links to find a ECU replacement if you use the search option - I will be replacing mine soon enough because it seems to be getting worse.
Old 10-13-10, 07:31 AM
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I doubt it's the ECU, check for vacuum leaks or any possible signs or an un-metered leaked after the throttle body... Just my 2 cents.
Old 10-13-10, 02:46 PM
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Originally Posted by 3UZFTE
I doubt it's the ECU, check for vacuum leaks or any possible signs or an un-metered leaked after the throttle body... Just my 2 cents.
given the TSB for 95-96 ECUs doing just this, i would say it's a fair possibility.

search this forum for "ecu*" without the quotes and you'll see other member's results.
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